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Finding the Fourth Proportional to 518,972.40, 778,458.60 and 341,679.60

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Solution

The fourth proportional to 518,972.40, 778,458.60 and 341,679.60 is: 512,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,972.40 : 778,458.60 = 341,679.60 : x
  2. Step 2: Convert to fraction form
    518,972.40/778,458.60 = 341,679.60/x
  3. Step 3: Cross multiply
    518,972.40x = 778,458.60 × 341,679.60
  4. Step 4: Simplify right side
    518,972.40x = 265,983,423,064.56
  5. Step 5: Solve for x
    x = 265,983,423,064.56/518,972.40
  6. Step 6: Final answer
    x = 512,519.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.